It's All about the Money, Honey - S6-E10
Continuity mistake: Kelsey stands up to leave the bar with her phone in her hand. After she leaves, her phone is on the table in front of her now empty chair. Next scene she is in her hotel room using her phone.
Food Fight - S3-E2
Continuity mistake: At the start after Teddy steals Oscar's fries, he eats them, leaving his fork empty. The angle changes and suddenly there are plenty of fries on his fork.